add postgres extension postgres_fdw to tf

[DeclanClarkeCGI]

Does this PR introduce a breaking change? (check one with "x")

[ ] Yes
[X ] No

[hmcts-jenkins-cnp]

Plan Result (stg)

⚠️ Resource Deletion will happen

This plan contains resource delete operation. Please check the plan result very carefully!

Plan: 1 to add, 0 to change, 1 to destroy.

• Create
  • module.opal-fines-db.azurerm_postgresql_flexible_server_configuration.pgsql_server_config["azure.extensions"]
• Delete
  • module.opal-fines-db.azurerm_postgresql_flexible_server_configuration.pgsql_server_config["backslash_quote"]

Change Result (Click me)

  # module.opal-fines-db.azurerm_postgresql_flexible_server_configuration.pgsql_server_config["azure.extensions"] will be created
  + resource "azurerm_postgresql_flexible_server_configuration" "pgsql_server_config" {
      + id        = (known after apply)
      + name      = "azure.extensions"
      + server_id = "/subscriptions/74dacd4f-a248-45bb-a2f0-af700dc4cf68/resourceGroups/opal-fines-service-data-stg/providers/Microsoft.DBforPostgreSQL/flexibleServers/opal-fines-service-stg"
      + value     = "POSTGRES_FDW"
    }

  # module.opal-fines-db.azurerm_postgresql_flexible_server_configuration.pgsql_server_config["backslash_quote"] will be destroyed
  # (because key ["backslash_quote"] is not in for_each map)
  - resource "azurerm_postgresql_flexible_server_configuration" "pgsql_server_config" {
      - id        = "/subscriptions/74dacd4f-a248-45bb-a2f0-af700dc4cf68/resourceGroups/opal-fines-service-data-stg/providers/Microsoft.DBforPostgreSQL/flexibleServers/opal-fines-service-stg/configurations/backslash_quote" -> null
      - name      = "backslash_quote" -> null
      - server_id = "/subscriptions/74dacd4f-a248-45bb-a2f0-af700dc4cf68/resourceGroups/opal-fines-service-data-stg/providers/Microsoft.DBforPostgreSQL/flexibleServers/opal-fines-service-stg" -> null
      - value     = "on" -> null
    }

Plan: 1 to add, 0 to change, 1 to destroy.